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			uintspec.c
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/*====================================================================*
 *
 *   uint64_t uintspec (char const * string, uint64_t minimum, uint64_t maximum);
 *
 *   number.h
 *
 *   convert a numeric string to an unsigned integer; confirm that
 *   the result does not exceed the specified range; report errors
 *   and terminate the program on error;
 *
 *   Motley Tools by Charles Maier &lt;cmaier@cmassoc.net&gt;;
 *   Copyright (c) 2001-2006 by Charles Maier Associates;
 *   Licensed under the Internet Software Consortium License;
 *
 *--------------------------------------------------------------------*/

#ifndef UINTSPEC_SOURCE
#define UINTSPEC_SOURCE

#include &lt;stdlib.h&gt;
#include &lt;inttypes.h&gt;
#include &lt;ctype.h&gt;
#include &lt;errno.h&gt;

#include &quot;../tools/number.h&quot;
#include &quot;../tools/error.h&quot;
#include &quot;../tools/types.h&quot;

uint64_t uintspec (char const * string, uint64_t minimum, uint64_t maximum)

{
	char const * number = string;
	unsigned radix = RADIX_DEC;
	uint64_t value = 0;
	unsigned digit;
	if (*number == '0')
	{
		number++;
		if ((*number == 'b') || (*number == 'B'))
		{
			radix = RADIX_BIN;
			number++;
		}
		else if ((*number == 'x') || (*number == 'X'))
		{
			radix = RADIX_HEX;
			number++;
		}
	}
	while ((digit = todigit (*number)) &lt; radix)
	{
		value *= radix;
		value += digit;
		number++;
	}
	if (*number)
	{
		error (1, EINVAL, &quot;Have '%s' but want base %d integer&quot;, string, radix);
	}
	if ((value &lt; minimum) || (value &gt; maximum))
	{
		error (1, ERANGE, &quot;Have %s but want %&quot; PRId64 &quot; thru %&quot; PRId64, string, minimum, maximum);
	}
	return (value);
}

#endif


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